How to set up family sharing in Photos
If more than one Mac- or iOS device-using person lives under your roof—or if you share your Mac with one or more people—using Photos in a family situation can be a complicated affair. Because you can’t share Photos libraries across a network, you quickly end up with multiple libraries (one for each Mac user account) and nobody remembers which pictures live where. It’s a nightmare; but fortunately, Apple has a solution.
from Macworld http://ift.tt/1Kt1Q1Z